Thermostatic window ventilator



May 15, 1951 H. R. RAwsoN 2,552,735

THERMosTATIc wINDow vENTILAToR Filed July 2s, 194s 2 sheets-sneer 1 INI/EN TOR.

May 15, 1951 H. R. RAwsoN THERMOSTATIC WINDOW VENTILATOR v2 Sheets-Sheet 2 Filed July 23, 1948 k.N. MM M I@ m E. 7 .WA w i, `4 H Patented May 15, 1951 UNITED STTES `PATIENT OFFICE 3 Claims.

This invention relates generally to window ventilators and specifically to window ventilators controlled by thermostatic elements.

An object of this invention is to provide an inexpensively constructed window ventilator, the operation of which is responsive to the temperature within the room which it ventilates.

Another object of the invention is to provide a window ventilator which is easily installed between protruding sash guides of a window casement without removing the guides or without defacement of the easement.

A further object of the invention is to provide a window ventilator having a temperature responsive element positioned out of the way of drafts through the ventilator, and one being more responsive to the temperature of the room.

Further objects and advantages of this invention as well as its construction, arrangement, and operation, will be apparent from the following description and claims when taken in connection with the accompanying drawing, in which:

Figure 1 is a view in elevation oi' the room side of the ventilator.

Figure 2 is a view in elevation of the ventilator with the positioning plate raised to permit placing in a window easement.

Figure 3 is a view in elevation of the ventilator as it appears on the outside of the room.

Figure 4 shows the ventilator in place below a lower sash and between it and a casement.

Figure 5 is a side view in section taken on line 5-5 of Figure 1.

Figure 6 is an end View partly in section taken on line 6-6 of Figure 1.

Figure '7 is a view in section taken on line I--T of Figure 1, and

Figure 8 is a view in section and partly in elevation of the thermostatic element in expanded condition raising the ventilator plate.

Referring in more detail to the drawings, in

Figures 1 to 3 ventilator frame II has circular openings or apertures I 2 through it and has hinged plate or cover I3 positioned to close the apertures when in a lowered position, the plate I3 being mounted on a pair of hinges 35, 36 for pivotal movement about an axis extending longitudinally of the frame II.

At one end of the frame I I is a spacing plate I4 secured by screws or other means not illustrated and on the opposite side a similar plate I6 is likewise attached. These plates I4 and I6 cover the diagonally shaped end I5 of the frame, and serve as guides to hold the extension plate II which alsohas a diagonally shaped end to match the end I5. This permits the ventilator frame to be positioned within a window easement I8 as shown in Figure 4 without the necessity of cutting any of the easement side strips or guide channels. Diagonally shaped extension plate Il' may be cut at its other end in order to lit a window easement.

In Figures 1, 2, 6 and 8, the thermostatic element shown generally as 20 is composed of bracket 2l secured by rivets 2Ia or other conventional means to frame II. Bracket 2I is U-shajped and has a hole 2 Ib through which is positioned bolt 22 threadably engaged with nut 23 soldered or otherwise secured to the bracket 2 I Knurled knob 24 has a pointer 25 secured thereto which in conjunction with a dial 26 shows the relative setting of the thermostatic element.

Attached to bolt 22 is bellows 21 being filled with a vapor or liquid which is responsive to temperature changes to expand or contract the length of the bellows. At the other end of bellows 21 bolt 28 is free to pass through hole 29 in the ventilator frame II and bears against the inside oi the cover I3. In an expanded condition, bellows 21 pushes the cover I3 outwardly as shown in Figure 8.

In operation, the frame II is positioned in the easement between one of the sashes and the casement, and the extension plate I1 is cut to t the remaining Space and is slipped into place. The adjusting of the thermostatic element 2i) is accomplished by turning knurled knob 24 in order to admit colder air to the enclosed room.

It is to be understood that various modifications and changes may be made in this invention without departing from the spirit and scope thereof, as set forth in the appended claims.

What is claimed is:

1. In a window ventilator, an upstanding frame adapted to be positioned between a sash and a easement with one face exposed, means engaging one end of said frame adapting the latter for securement between opposed guide channels of said casement, said means comprising an extension disposed in end to end abutting relation with respect to said one end of said frame, and opposed guide plates secured to said one end of said frame and extending beyond the latter for the engagement therebetween of the adjacent end of said extension, there being a plurality of apertures in said frame for the admission of air therethrough, a plate positioned in face to face relation with respect to the other face of said frame and having its upper edge mounted on said frame for swinging movement into and out of abutting recurement between opposed guide channels of saidV easement, there being a plurality of apertures in said frame for the admission of air therethrough, a plate positioned in face to, face relation with respect to the other face of saidframe and having its upper edge mounted on said frame for swinging movement into and out of abutting relation with respect to said other face of said frame, and temperature responsive means carried on the :exposed face of said frame and engageable with said piateior positioning the latter in select positionsof its movement toward and away from said other face of said plate in response to temperature clfianges,V said last named means comprising a U-shaped'bracket having its legs arranged adjacent the other face of said frame and xedly secured tothe latter, a temperature responsive bellows positioned'dntermediate the bight of said Vbracketand said frame and mounted on said bracket and said frame for expansion and contraction, means carried by the end of said bellows adjacent said frame and operatively engaging saidA plate formoving the latter towardl and away from said frame in response toV the contractions and expansions of said bellows, and hand actuable means carried by said bracket and operatively Yengaging` theother end of said bellows-for adjustably positioningv said/bellows within said bracket.

easement, there being a plurality of apertures in 1 said frame for the admission of air therethrough,

VVa plate positioned in face to face relation with 4 respect to the other face of said frame and having its upper edge mounted on said frame for swinging movement into and out of abutting relation with respect to said other face of said frame, and temperature responsive means carried on the exposed face of said frame and engageable with said plate for positioning the latter in select positions of its movement toward and away from the other face of said plate in response to temperature changes, said last named means comprising a U- shaped bracket having its legs arranged adjacent the other face of the said frame and Xedly secured to the latter, a temperature responsive bellows positioned intermediate the bight of said bracket and said frame and mounted on said bracket and said frame for expansion and contraction, means carried by the end of said bellows adjacent said frame and operatively engaging said plate for moving the latter toward and away from said frame in response to the contractions and expansions of said bellows, and hand aetuable means carried by said bracket and operatively engaging the other end of said bellows for adjustably positioning said bellows within said bracket, said last named means comprising a bolt rotatably supported intermediate its ends in the eight of said bracket and mounted on the latter for movement toward and away from said other end of said bellows, and means arranged exteriorly of said bracket and ixedly securedto said. bolt ior efecting the movement of said bolt.

HAROLD R. RAWSON.

REFERENCES 4CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 860,366 Graebing July 16, 1907 1,153,547 Finney Sept. 14, 1915 1,528,786 Purdy Mar. 10, 1925 1,783,574 Tawler Dec. 2, 1930 2,107,809 Warner Feb. 8, 1938 2,380,935 Boyle Aug. 7, 1945 2,474,760 Smith June 28, 1949 2,506,329 Hamilton May 9, 1950 

